Comparing 3 Dunlop 200s

I am currently planning to switch over to the Dunlop 200 series. While finding leftovers of some old Aerogel 200s at my local retailer for a very low price, I wonder how it performs compared to the newer 4D 200 and the latest Biomimetic 200. Is it worth buying the new one or to save a lot of money for the older Aerogel/4D?